Improvement in boring-machines



FRAN'K'S. AL EN-8L CHARLES F.f Rl TCH;EL.

chines. Patented Nov. 21.1871.

lmprov'eme nt in Boring Ma N0. 121,074.

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AM FHOTO-UTHDGRAFIi/F ca. M x [asau/Ml'wraum/ FRANK S. ALLEN AND CHARLESF. RITGHEL, OF NEW YORK, N. Y.

IMPROVEMENT IN BORING-MACHINES.

Specification forming part of Letters Patent No. 121,074, dated November21, 1871.

To all whom it may concern:

Be it known that we, FRANK S. ALLEN and CHARLES F. RITGHEL, of the city,county, and State of New York, have invented certain Improvements inBoring-Machine; and we do hereby declare that the following is a full,clear, and exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanying draw in g forming a part of this specification, in whichstructed and arranged that all the holes, whatever or however differenttheir inclination, may be bored at the same time and at one operation;and it consists in the construction and combination of various parts ofthe machine, as hereinafter more fully described.

A represents the frame of the machine. B is the driving-shaft, to whichthe power is. applied, and which revolves in brackets attached to thelower part of the frame A. To the shaft B is attached a long pulley ordrum, O, around which passes the belt D, which also passes around thepulley E, the journals of which revolve in the brackets or frame F,which fits and slides upon ways in the frame A. To the forward journalof the pulley E is attached a crank-wheel, G, to the crank-pin of whichis pivoted the plate H. The plate H is also pivoted near its ends to thecrank-pins of two crankwheels, I, attached to the ends of two shortshafts, J, which revolve in bearings in the end parts of the frame F. Bythis construction the plate H is kept horizontal and in the samevertical plane during its movement. To the plate H are pivoted a seriesof oblique cranks, K, the forward parts of which work in holes in thesupporting plate or frame L, which fits and slides upon the ways formedupon the frame A. The cranks K are equal in number to, and are arrangedin the same relative position as, the holes to be bored. To the forwardends of the cranks K are attached, or upon them are formed, the shanksof the bits of the boring-tools M, which are made elastic to adapt themfor boring holes at difierent inclinations, and the forward parts ofwhich pass through guide-holes in the plates N, the base-frame of whichis securely attached to the frame A so as to be stationary. Theguide-holes in the plate or plates N are so arranged as to give the bitsthe proper position to bore the inclined holes in the work, each at itsproper inclination. O is the rest to receive and support the work whilebeing bored, and which is also stationary, its base-frame being rigidlyattached to the frame A. To the base of the guide-plate or frame L andof the pulley-frame F are securely attached nuts P, through which passesthe screw Q, which is swiveled to the frame A, and to which power may beapplied by a pulley and belt or by other well-known means. By thisconstruction, by turning the swiveled screw Q in one direction the frameF and plate or frame L will be moved forward to feed the boring-tools Mto their work, and by turning the said screw Q in the other directionthe frame F, and frame or plate L will be moved back to withdraw theboring-tools M from the material bored. The plate or frame L and theframe F being both moved by the revolution of the same screw, are alwaysheld in the same relative position while being moved forward andbackward.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent-- 1. The combination of the sliding frame Fthat carries the pulley E and crank-wheels G I, the sliding plate orframe L that supports the forward parts of the cranks K and theirattached nuts P with the frame A, swiveled screw Q, stationaryguide-plate N that guides the boringtools, and stationary rest 0 thatholds the work substantially as herein shown and described, and for thepurpose set forth.

2. The boring-tools M, made elastic, and arranged in the guide-frames orplates L N, so as to converge, as shown and described, for the purposespecified.

The above specification of our invention signed by us this 30th day ofSeptember, 1871.

FRANK S. ALLEN.

Witnesses: CHARLES F. RITGHEL.

J AMES T. GRAHAM, T. B. MOSHER.

